Stove



(No Model.) 2 Sheets-Sheet 1.

M. L. LARSON;

V STOVE. No. 505,772. Patented Sept. 26, 1893.

(No Model.) '2 Sheets-Sheet 2.

M. L. LARSON.

STOVE.

Patented Sept. 26, 1893.

UNITED STATES PATENT OFEIoE.

\ MARTIN LAURITZ LARSON, OF YVARREN, MINNESOTA.

STOVE.

SPECIFICATION forming part of Letters Patent No. 505,772, datedSeptember 26, 1893.

Application filed May 6, 1893. Serial No. 473.282. (No model.)

To all whom it may concern:

Be it known that I, MARTIN LAURITZ LAR- SON, a citizen of the UnitedStates, residing at Warren, in the county of Marshall and State ofMinnesota, have invented certain new and useful Improvements in Stoves;and I do declare the following to be a full, clear, and exactdescription of the invention, such as will enable others skilled in theart to which it appertains to make and usethe same.

This invention has relation to an improvement in heating stoves, and ithas for its object to provide a stove which will be efiective for thepurposes designed, and which will give 0% great heat in proportion tothe quantity of fuel consumed; the parts being of a cheap and durableconstruction and easy to operate.

The invention will be fully understood from the following descriptionand claims when taken in connection with the annexed drawings, in which-Figure 1, isa vertical, central sectional view of my improved stove.Fig.2, is a horizontal sectional view taken in the plane indicated bythe dotted line m, 00, on Fig. 1, and Fig. 3, is a similar view taken intheplane indicated by the dotted line y, y, on Fig. 1.

Referring by letter to said drawingsz-A, indicates the cylindricalcasing or jacket of the stove, which may be made of sheet iron, or othersuitable material, and may be of a sufficient height and width. B,indicates the inner wall of said casing, which together with the outerwall, forms a vertically disposed annular chamber a. This casing ismounted upon a base chamber 0, and communicates therewith, as shown. Thebase which is of greater diameter than the cylindrical body portion orcasing A, may be either formed integral with said body portion orfixedly connected thereto,in any suitable manner. Arranged centrally inthis base chamber is the ash-pit b, which has a door 0, in one side, asshown, to afford convenient access to said pit or box, and it is obviousthat a pan or other suitable receptacle may be placed in the ash pit orbox.

Secured at a suitable distance above the ash pit, is a circular frame D,and in this frame are journaled a suitable number of vertically-disposedrollers (Z, to furnish a bear- I ing for a partially rotatable frame E,which carsurface-uppermost, and the bars of the grate have vertical lugsor projections e, at their outer or lower ends. This grate has securedto it, the inner end of a rod G, which has an angular hand piece f, atits outer end, and passes through a slot in the front Wall. of the stovefor the convenient grasp of an attendant. The grate is journaled bymeans of trunnions g, in the partially rotatable frame E, so that byoscillating the rod f, the grate may be partially rotated back andforth, while by turning the rod, the grate may be dumped.

H, indicates the fire pot. This fire pot which is of a circular form incross section, is quite long or high compared with its circular area,and is arranged centrally within the stove above the grate, as shown.This fire pot, is separated from the inner wall B, of the casing, bymeans of an interspace or external annular chamber h, andis provided atits upper end with a flaring mouth having a perforated ring or annularplate I, arranged between the top edge of the fire pot, and the wall B,of the casing. Above the fire pot is an enlarged chamber K, which iscovered by a roof wall 1', having a depending tube L, in its center,which extends into the chamber K, and has a damper M, pivoted in saidtube, which is provided with an operating rod N, passing out through thecasing, and above the chamber K, is another chamber 1?, which is coveredby a top wall Q, and is provided with a collar or flange k, for theattachment of a smoke pipe.

The chamber K, is provided with a doorway Z, and a door m, and the firepot is provided with a door-way n, and a door p, for closing the same,whereby access may be had to both the grate and the fire pot or chamber.

R, indicates vertical pipes. These pipes are passed through thechamberor interspace a, formed by the casing or outer wall, and theinner wall B, of the stove. These pipes are open at opposite ends,andthe lower ends are flared downwardly as shown at q, for the freeadmission of air. These pipes are closed from communication with theinterior of the stove or smoke and particles of combustion, and are keptfrom contact with the outer and inner wallsof the casing. The annularchamber h, opens into the base chamber at its lower end, as shown, andthis base chamber is connected by means of a circular series of pipes S,with the upper chamber P. These pipes S, are held from contact with theWalls of the casing, and surround the pipes R, between the base chamberand the chamber P, so that a passage may be formed between said pipesfor the free circulation of hot air, as well as particles of combustion.

The stove may be mounted upon a suitable base, or the flared ends of thepipes B, may be extended to form legs or supports T, having apertures r,for the admission of air, although I do not wish to confine myself tothis means of support.

The body of the stove may be suitably ornamented.

In operation, when the fire has been started, thedamperM, may be openedfor a sufficient time, when the smoke and particles of combustion, willpass out through the tube L, and from the chamber Q, off through thesmoke pipe. By closing the damper M, the heat and particles ofcombustion will be directed as they rise in the chamber K, down throughthe perforated plate I, as indicated by the arrows, and from thecircular chamber 71, down into the base chamber 0, and from thence upthrough the pipes S, and around the pipes B, into the chamber P, and offto the smoke pipe Where a damper may be providedfor regulating suchoutlet. The pipes R, are designed to take the air from beneath thestove, and at the floor of a room, and carry itup and discharge it intothe room above the stove; the particles of combustion being brought intocontact with the outer surface ofv the pipe R, will of course heat suchair While it is being conducted through the pipes R, and by reason ofall of these pipes being kept from contact'with the outer wall of thecasing, they will not be liable to be chilled by the outer air. Thetubes R, are to be constructed in such a manner that they can be easilytaken out at the bottom of the stove, when tubes and base requirecleaning.

Having described my invention, what I claim isl. The body or casing,formed with double walls so as to provide a chamber between them,incombination with the base chamber, the fire pot, arranged with anexternal circular chamber, in communication with the base chamber, anupperchamber above the double walled casing, pipes connecting said upperchamber with the base chamber, and also in communication with the firepot or chamber, and pipes passing from below the stove to the topthereof, and through the pipes which connect the top chamber with thebase chamber, substantially as specified.

2. A stove having the base chamber, a fire box therein, a chamber abovethe fire box with a damper for cutting off communication between thefire box and smoke pipe, pipes connecting the base chamber with thepassage leading to the smoke pipe, and pipes passing through the latterpipes and open above and below the stove respectively, substantially asspecified.

3. A heating stove, having the long cylindrical fire-pot, with theperforated plate at its mouth, and surrounded bya chamber, a basechamber communicating with the lower end of the chamber around the firepot, and also having a chamber above the fire pot, in communication withthe smoke pipe, the circular chamber or interspace exterior totheohamber surrounding the fire pot, a circular series of pipes passingvertically through the latter chamber, and connecting the base chamberwith the said upper chamber, and a circular series of pipes havingflared lower ends passing through the first named series of pipes andopening above and below the stove respectively, as set forth.

at. The improved stove, comprising the base chamber, having an ,ashchamber, the fire pot II, having the grate therein, and the perforatedplate I, at the upper end of said pot, and also having the chamber h,surrounding the pot, and leading into the base chamber, the chamber K,above the fire chamber, and the upper chamber P, having the tube L, andthe damper therein, the circular series of pipes passing through thechamber or interspace a, and connecting the base chamber with thechamber P, and indirectly connecting the latter chamber with the firepot, and the pipes R, passing through the pipes S, and extending fromabove the stove to beneath the base chamber, and terminating intlaringportions, substantially as specified.

In testimony whereof I affix my signature in presence of two witnesses.

MARTIN LAURITZ LARSON.

\Vitnesses:

WINTHRoP N. POWELL, ALFRED C. SWANDBY.

